Toy grenade prompts evacuation at World Financial Center

View full sizeSeth Wenig / AP PhotoMembers of the evacuation team stand among other office workers after Two World Financial Center was briefly evacuated in New York, Thursday.

NEW YORK (AP) -- A toy grenade was to blame for an evacuation Thursday at a building near New York's ground zero, authorities said.

The police bomb squad was called to 2 World Financial Center in lower Manhattan at midday when a security guard reported a package that seemed suspicious. Brookfield Properties, which runs the property, ordered an evacuation as a precaution.

Employees in business suits filed calmly back into the building after the NYPD declared the situation all clear about 90 minutes later.

Police said there was no threat, and no criminal investigation is taking place.

Several employees said an announcement came over the building loudspeakers telling them to evacuate as quickly as possible. Octavio Diaz was wearing a neon yellow backpack as he helped lead his co-workers out of the building to a nearby volleyball court, where they waited until the all-clear.

"Stuff like this happens, so you've got to take it seriously," he said. "We're ready to go."

The building is near the World Trade Center site, where the Sept. 11 attacks killed nearly 3,000 people. A 1993 bombing there killed six people and injured more than 1,000.